Update stdhash.hh
Update stdhash.hh

Fix installation issue on osx 10.14
aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator,aquaskyline/10xReadsSimulator